var vm = new Vue({
    el:'#app',
    data:{
        currentIndex: 0, //保存点击的按钮下标
        list:[
            { pic:'',name:'首页' },
            { pic:'',name:'爆爆团' },
            { pic:'',name:'订单' },
            { pic:'',name:'我的' },
        ]
    },
    methods:{
        handleClick(index){
            this.currentIndex = index;//保存点击的按钮下标
        }
    }
})